Stonehenge Aqua Hotpress Watercolor Blocks. Perfect for detailed watercolor, acrylic, gouache, markers & pen & ink. A 100% cotton, 140# ultra-smooth surface glued on 4 sides for a flat, buckle-free painting surface. These professional blocks stay perfectly flat while you work and withstand multiple washes and layers. Available in 7"x7", 7"x10", 9"x12", 10"x10", 10"x14", 12"x16", 14"x20", and 18"x24", they are archival, vegan-sized, and portable. Ideal for travel or studio use. Bold, modern covers boost shelf appeal and catch shopper attention. Product Details: • Sizes: 7"x7", 7"x10", 9"x12", 10"x10", 10"x14", 12"x16", 14"x20", 18"x24" • 100% cotton, 140# hot press surface, ultra-smooth finish • Glued on four sides for flat, buckle-free painting • Ideal for detailed watercolor, acrylic, gouache & mixed media • Archival, acid-free, vegan synthetic sizing for lasting results